Very challenging.
I didn't make it all the way through, but I saw some interesting things. The 3rd(?) playfield where it is all flipper was interesting. I liked ho the flippers would sometimes match up to create entirely new shapes. I found myself holding down the right flipper so I could clear the first area and then I had held it down for so long that I was surprised when I needed to use the right flipper and let it go instead.
I also thought the S shaped playfield was interesting because of how I couldn't stop the ball from regressing with the second flipper. I'm so used to being able to trap balls that this felt surreal.